package itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import itheima.Mapper.OrderMapper;
import itheima.common.BaseContext;
import itheima.common.CustomExcrption;
import itheima.entity.*;
import itheima.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @author shkstart
 * @create 2022-09-23-12:08
 */
@Service
public class OrderServiceimpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCarService shoppingCarService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    public void submit(Orders orders) {

        //获得当前用户id
        Long currentId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> shoppingCarts = shoppingCarService.list(lqw);

        if (shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomExcrption("购物车为空，不能下单");
        }

        //查询用户数据
        User byId = userService.getById(currentId);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook bookServiceById = addressBookService.getById(addressBookId);

        if (bookServiceById == null){
            throw new CustomExcrption("用户地址信息有误，不能下单");
        }
        //向订单表插入数据，一条数据
        long orderId = IdWorker.getId();//订单号

        //总金额
        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            //订单明细实体
            OrderDetail orderDetail = new OrderDetail();
            //设置明细表中的数据
            orderDetail.setOrderId(orderId);//订单编号
            orderDetail.setNumber(item.getNumber());//订单数量
            orderDetail.setDishFlavor(item.getDishFlavor());//菜品口味
            orderDetail.setDishId(item.getDishId());//菜品id
            orderDetail.setSetmealId(item.getSetmealId());//套餐id
            orderDetail.setName(item.getName());//菜品名称
            orderDetail.setImage(item.getImage());//图片名称
            orderDetail.setAmount(item.getAmount());//单份的金额
            //单份金额乘以数量
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(byId.getName());
        orders.setConsignee(bookServiceById.getConsignee());
        orders.setPhone(bookServiceById.getPhone());
        orders.setAddress((bookServiceById.getProvinceName() == null ? "" : bookServiceById.getProvinceName())
                + (bookServiceById.getCityName() == null ? "" : bookServiceById.getCityName())
                + (bookServiceById.getDistrictName() == null ? "" : bookServiceById.getDistrictName())
                + (bookServiceById.getDetail() == null ? "" : bookServiceById.getDetail()));
        //向订单明细表中插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCarService.remove(lqw);
    }
}
